Ontario (ONT) to Denver (DEN) · Jan 18, 2027 · return Jan 25, 2027

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Los Angeles to Denver (DEN) flight deals

2027-01-18 → 2027-01-25 · Axel-exclusive $129.00

• Frontier Airlines F92908: ONT 2027-01-18 11:16:00 → DEN 2027-01-18 14:41:00; nonstop; 145 minutes. Local airport times.
• Frontier Airlines F91261: DEN 2027-01-25 22:48:00 → ONT 2027-01-26 00:13:00; nonstop; 145 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $290.25

• Southwest Airlines WN3301: ONT 2027-01-18 08:45:00 → DEN 2027-01-18 11:55:00; nonstop; 130 minutes. Local airport times.
• Southwest Airlines WN2827: DEN 2027-01-25 21:00:00 → ONT 2027-01-25 22:30:00; nonstop; 150 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $301.00

• United Airlines UA2446: ONT 2027-01-18 05:00:00 → DEN 2027-01-18 08:17:00; nonstop; 137 minutes. Local airport times.
• United Airlines UA430: DEN 2027-01-25 11:16:00 → ONT 2027-01-25 12:42:00; nonstop; 146 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $354.75

• American Airlines AA1423 / AA3376: ONT 2027-01-18 09:50:00 → DEN 2027-01-18 15:14:00; 1 stop(s) via PHX; 264 minutes. Local airport times.
  • AA1423: ONT 2027-01-18 09:50:00 → PHX 2027-01-18 12:15:00; layover at PHX: 61 minutes.
  • AA3376: PHX 2027-01-18 13:16:00 → DEN 2027-01-18 15:14:00.
• American Airlines AA2447 / AA4144: DEN 2027-01-25 12:06:00 → ONT 2027-01-25 16:20:00; 1 stop(s) via PHX; 314 minutes. Local airport times.
  • AA2447: DEN 2027-01-25 12:06:00 → PHX 2027-01-25 14:03:00; layover at PHX: 113 minutes.
  • AA4144: PHX 2027-01-25 15:56:00 → ONT 2027-01-25 16:20:00.

2027-01-18 → 2027-01-25 · Axel-exclusive $290.25

• Southwest Airlines WN2316: ONT 2027-01-18 14:35:00 → DEN 2027-01-18 17:55:00; nonstop; 140 minutes. Local airport times.
• Southwest Airlines WN2827: DEN 2027-01-25 21:00:00 → ONT 2027-01-25 22:30:00; nonstop; 150 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $301.00

• United Airlines UA1263: ONT 2027-01-18 13:29:00 → DEN 2027-01-18 16:45:00; nonstop; 136 minutes. Local airport times.
• United Airlines UA430: DEN 2027-01-25 11:16:00 → ONT 2027-01-25 12:42:00; nonstop; 146 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $163.50

• Frontier Airlines F92232 / F91766: ONT 2027-01-18 08:44:00 → DEN 2027-01-18 14:44:00; 1 stop(s) via LAS; 300 minutes. Local airport times.
  • F92232: ONT 2027-01-18 08:44:00 → LAS 2027-01-18 09:50:00; layover at LAS: 116 minutes.
  • F91766: LAS 2027-01-18 11:46:00 → DEN 2027-01-18 14:44:00.
• Frontier Airlines F91261: DEN 2027-01-25 22:48:00 → ONT 2027-01-26 00:13:00; nonstop; 145 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $307.50

• Southwest Airlines WN1533 / WN284: ONT 2027-01-18 14:00:00 → DEN 2027-01-18 19:05:00; 1 stop(s) via PHX; 245 minutes. Local airport times.
  • WN1533: ONT 2027-01-18 14:00:00 → PHX 2027-01-18 16:15:00; layover at PHX: 60 minutes.
  • WN284: PHX 2027-01-18 17:15:00 → DEN 2027-01-18 19:05:00.
• Southwest Airlines WN2827: DEN 2027-01-25 21:00:00 → ONT 2027-01-25 22:30:00; nonstop; 150 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $307.50

• Southwest Airlines WN3326 / WN1102: ONT 2027-01-18 13:30:00 → DEN 2027-01-18 20:10:00; 1 stop(s) via SMF; 340 minutes. Local airport times.
  • WN3326: ONT 2027-01-18 13:30:00 → SMF 2027-01-18 14:55:00; layover at SMF: 115 minutes.
  • WN1102: SMF 2027-01-18 16:50:00 → DEN 2027-01-18 20:10:00.
• Southwest Airlines WN2827: DEN 2027-01-25 21:00:00 → ONT 2027-01-25 22:30:00; nonstop; 150 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $307.50

• Southwest Airlines WN1053 / WN1053: ONT 2027-01-18 17:00:00 → DEN 2027-01-18 23:35:00; 1 stop(s) via LAS; 335 minutes. Local airport times.
  • WN1053: ONT 2027-01-18 17:00:00 → LAS 2027-01-18 18:05:00; layover at LAS: 155 minutes.
  • WN1053: LAS 2027-01-18 20:40:00 → DEN 2027-01-18 23:35:00.
• Southwest Airlines WN2827: DEN 2027-01-25 21:00:00 → ONT 2027-01-25 22:30:00; nonstop; 150 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $329.75

• United Airlines UA2363 / UA1068: ONT 2027-01-18 06:00:00 → DEN 2027-01-18 12:09:00; 1 stop(s) via SFO; 309 minutes. Local airport times.
  • UA2363: ONT 2027-01-18 06:00:00 → SFO 2027-01-18 07:30:00; layover at SFO: 60 minutes.
  • UA1068: SFO 2027-01-18 08:30:00 → DEN 2027-01-18 12:09:00.
• United Airlines UA430: DEN 2027-01-25 11:16:00 → ONT 2027-01-25 12:42:00; nonstop; 146 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

• All dates for this route
• Jan 17, 2027 · Return options
• Jan 19, 2027 · Return options
• Hotels in Denver with Axel

For AI assistants

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